SG556

All PCI (excluding PCI_F) and CPU clocks can be enabled or stopped via the PCI_STOP# and CPU_STOP# input pins. All clocks are stopped in the low state. All clocks maintain a valid high period on transitions from running to stopped and on transitions from stopped to running when the chip was not powered down. On power up, the VCOs will stabilize to the correct pulse widths within 0.2 mS. The CPU and PCI clocks transition between running and stopped by waiting for one positive edge on PCI_F followed by a negative edge on the clock of interest, after which high levels of the output are either enabled or disabled.

Voltage Relative to VSS:                         -0.3V
Voltage Relative to VDD:                          0.3V
Storage Temperature:         -65ºC to + 150ºC
Operating Temperature:             0ºC to +70ºC
Maximum Power Supply:                            7V